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Finding the Fourth Proportional to 393,055.62, 542,418.57 and 223,299.06

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Solution

The fourth proportional to 393,055.62, 542,418.57 and 223,299.06 is: 308,153.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,055.62 : 542,418.57 = 223,299.06 : x
  2. Step 2: Convert to fraction form
    393,055.62/542,418.57 = 223,299.06/x
  3. Step 3: Cross multiply
    393,055.62x = 542,418.57 × 223,299.06
  4. Step 4: Simplify right side
    393,055.62x = 121,121,556,807.54
  5. Step 5: Solve for x
    x = 121,121,556,807.54/393,055.62
  6. Step 6: Final answer
    x = 308,153.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.